lua-resty-ctxdump - stash and apply the ngx.ctx, avoiding being destoried after Nginx internal redirect happens.
Probably production ready in most cases, though not yet proven in the wild. Please check the issues list and let me know if you have any problems / questions.
location /t1 {
set $ctx_ref "";
content_by_lua_block {
local ctxdump = require "resty.ctxdump"
ngx.ctx = {
Date = "Wed May 3 15:18:04 CST 2017",
Site = "unknown"
}
ngx.var.ctx_ref = ctxdump.stash_ngx_ctx()
ngx.exec("/t2")
}
}
location /t2 {
internal;
content_by_lua_block {
local ctxdump = require "resty.ctxdump"
ngx.ctx = ctxdump.apply_ngx_ctx(ngx.var.ctx_ref)
ngx.say("Date: " .. ngx.ctx["Date"] .. " Site: " .. ngx.ctx["Site"])
}
}
syntax: ref = stash_ngx_ctx()
phase: *init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*,
content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*,
ngx.timer.*, balancer_by_lua*
Reference the ngx.ctx, returns an anchor(a new reference maintained by lua-resty-ctxdump).
Note: stash_ngx_ctx and apply_ngx_ctx must be called in pairs, otherwise memory leak will happen! See apply_ngx_ctx.
syntax: old_ngx_ctx = apply_ngx_ctx(ref)
phase: *init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*,
content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*,
ngx.timer.*, balancer_by_lua*
fetch the old ngx.ctx with the anchor returns from stash_ngx_ctx . After that, the anchor will be out of work.
Note: stash_ngx_ctx and apply_ngx_ctx must be called in pairs, otherwise memory leak will happen! See stash_ngx_ctx.
Alex Zhang(张超) [email protected], @api7.ai.
The bundle itself is licensed under the 2-clause BSD license.
Copyright (c) 2017-2021, Alex Zhang.
This module is licensed under the terms of the BSD license.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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